کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
275401 1429529 2016 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Parametric study on the axial performance of a fully grouted cable bolt with a new pull-out test
ترجمه فارسی عنوان
مطالعه پارامتری بر روی عملکرد محوری از یک پیچ کابل کاملا grouted با یک آزمایش خروج جدید
کلمات کلیدی
پیچ و مهره کابل اصلاح شده؛ عملکرد انتقال بار؛ لغزش برشی؛کابل رابط/ملات ؛ طول جایگزینی
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات زمین شناسی اقتصادی
چکیده انگلیسی

Modified cable bolts are commonly used in underground mines due to their superior performance in preventing bed separation when compared with plain strands. To better test the axial performance of a wide range of cable bolts, a new laboratory short encapsulation pull test (LSEPT) facility was developed. The facility simulates the interaction between cable bolts and surrounding rock mass, using artificial rock cylinders with a diameter of 300 mm in which the cable bolt is grouted. Furthermore, the joint where the load is applied is left unconstrained to allow shear slippage at the cable/grout or grout/rock interface. Based on this apparatus, a series of pull tests were undertaken using the MW9 modified bulb cable bolt. Various parameters including embedment length, test material strength and borehole size were evaluated. It was found that within a limited range of 360 mm, there is a linear relationship between the maximum bearing capacity of the cable bolt and embedment length. Beyond 360 mm, the peak capacity continues to rise but with a much lower slope. When the MW9 cable bolt was grouted in a weak test material, failure always took place along the grout/rock interface. Interestingly, increasing the borehole diameter from 42 to 52 m in weak test material altered the failure mode from grout/rock interface to cable/grout interface and improved the performance in terms of both peak and residual capacity.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Mining Science and Technology - Volume 26, Issue 1, January 2016, Pages 53–58
نویسندگان
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